I have been traveled to Saint Martin over 60 times in the last 20 years. I love Orient beach and have stayed at Le Plantation the last 12 visits. It is not a 5-star hotel, it is in a very quiet area. The hotel provides you with a free breakfast and free chairs and umbrellas at the 5 stars beach bars. You are close to Orient Village restaurants and food stores. The rooms have a refrigerator and stove if you want to eat in. Staff is excellent.
There is not much night life after dark, like Maho and Simpson Bay so all depends what are you are looking for on your vacation.
I always use Jim Ruos of Caribbean Island Travel Service to reserve my stay at the hotel.